Dye-sensitized nanostructured p-type nickel oxide film as a photocathode for a solar cell
Journal Article
·
· Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Nanostructured NiO film was prepared by depositing nickel hydroxide slurry on conducting glass and sintering at 500 C to a thickness of about 1 {micro}m. The photocurrent-voltage (IV) characteristics of the plain nanostructured NiO electrode recorded potentiostatically in a standard three-electrode setup upon UV illumination demonstrate p-type behavior, while the IV characteristics of a dye-sensitized nanostructured NiO electrode coated with erythrosin B show cathodic photocurrent under visible light illumination. The highest incident photon-to-current conversion efficiencies of tetrakis(4-carboxyphenyl)porphyrin (TPPC) and erythrosin B-coated NiO films were 0.24% and 3.44%, respectively. In sandwich solar cells with a platinized conducting glass as counter electrode exposed to light from a sun simulator (light intensity: 68 mW/cm{sup 2}), a short-circuit cathodic photocurrent density (I{sub SC}) of 0.079 mA/cm{sup 2} and an open-circuit voltage (V{sub OC}) of 98.5 mV for TPPC-coated NiO electrode were achieved. Similarly, I{sub SC} = 0.232 mA/cm{sup 2} and V{sub OC} = 82.8 mV were registered when the NiO electrode was coated with erythrosin B. The cathodic photocurrent is explained by hole injection from dye molecule to the valence band of the p-NiO electrode.
- Research Organization:
- Uppsala Univ. (SE)
- OSTI ID:
- 20001121
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 42 Vol. 103; ISSN 1089-5647; ISSN JPCBFK
- Country of Publication:
- United States
- Language:
- English
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